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As zinc atoms leave a Zn rod and enter solution as $Zn^{2+}$, what charge develops on the rod and on the solution near the rod?
ARod becomes positive, solution near rod becomes negative
BBoth rod and solution remain neutral
CRod becomes negative, solution near rod becomes positive
DRod becomes negative, solution near rod also becomes negative
Answer & Solution
Correct answer: C. Rod becomes negative, solution near rod becomes positive
When Zn atoms leave the metal as $Zn^{2+}$, electrons remain on the rod. Therefore the rod becomes negatively charged. The solution gains excess positive charge near the rod due to the presence of $Zn^{2+}$ ions.
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